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INDUSTRIE
Technical Data
Nominal Heat Input D.H.W. & C.H. (gross)
Minimum Heat Input D.H.W. & C.H. (gross)
Nominal Heat Input D.H.W. & C.H. (net)
Minimum Heat Input D.H.W. & C.H. (net)
Nominal Heat Output D.H.W. & C.H.
Minimum Heat Output D.H.W. & C.H.
Maximum Gas Rate
Burner Pressure (max.)
Burner Pressure (min.)
Injector Marking (Main Burners)
Injector Size (4 off)
Pilot Injector Marking
Dimensions (overall):
Height
Width
Depth
Weight (nett)
Weight (gross)
Electricity supply:
External fuse
Electrical Input
Central Heating:
Max. Flow Temperature
Temperature Rise Across Boiler
Domestic Hot Water Flow:
35°C Rise
Minimum Domestic Hot Water Flow
Maximum Domestic Cold Water Inlet press.
Minimum Heating Circuit Pressure
Maximum Heating Circuit Pressure
Low water pressure switch
Boiler Water Capacity: Heating
Domestic Hot Water
Connections:
Gas
Domestic Hot Water Outlet
Domestic Cold Water Inlet
Pressure Relief Valve Drain
Central Heating Flow
Central Heating Return
Minimum Installation Clearances:
Sides - Left hand
Right hand
Front
Minimum Clearance below
Minimum Clearance above
4
G20
28.6 kW
12.8 kW
25.8 kW
11.5 kW
23.3 kW
9.7 kW
2.72 m
/h
3
14.5 mbar
2.7 mbar
210
2.10 mm
38/33A
1020 mm
480 mm
360 mm
51 kg
53 kg
230 V ~ 50 Hz
2 A
150 W
85 °C
20 °C
9.2 litres/min.
2.5 litres/min.
10 bar
0.8 bar
3.0 bar
0.4 bar
2 litres
0.5 litres
22 mm
15 mm
15 mm
15 mm
22 mm
22 mm
5 mm
5 mm
50 mm*
Notes:
200 mm
* Access to the front of the boiler must be
100 mm
available for maintenance (min. 600 mm)
G31
28.0 kW
12.5 kW
25.8 kW
11.5 kW
23.3 kW
9.7 kW
2.66 m
/h
3
36.0 mbar
7.9 mbar
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